# Announcements
**URL:** https://ask.igwn.org/c/announcements/10.md
[Latest](https://ask.igwn.org/latest.md) · [Categories](https://ask.igwn.org/categories.md) · [Tags](https://ask.igwn.org/tags.md)
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## [How to get announcements](https://ask.igwn.org/t/how-to-get-announcements/1437)
**Author:** [@jonah](https://ask.igwn.org/u/jonah)\
**Replies:** 0\
**Last updated:** [March 25, 2026, 10:49pm UTC](https://ask.igwn.org/t/how-to-get-announcements/1437 "2026-03-25T22:49:13Z")
Get announcements from GWOSC If you’d like to get notified of announcements from the GWOSC team, like new data sets and Open Data Workshops, all you need to do is watch the “Announcements” category. Click the bell in th…
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## [O4b Open Data Release](https://ask.igwn.org/t/o4b-open-data-release/1511)
**Author:** [@martinberoiz](https://ask.igwn.org/u/martinberoiz)\
**Replies:** 0\
**Last updated:** [May 26, 2026, 3:11pm UTC](https://ask.igwn.org/t/o4b-open-data-release/1511 "2026-05-26T15:11:46Z")
The LIGO, Virgo, and KAGRA collaborations have publicly released a new dataset from the second segment of their fourth observing run (O4b), covering gravitational-wave (GW) observations from April 10, 2024, to January 28…
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## [Astrophysical Calibration of GW Detectors](https://ask.igwn.org/t/astrophysical-calibration-of-gw-detectors/1504)
**Author:** [@martinberoiz](https://ask.igwn.org/u/martinberoiz)\
**Replies:** 0\
**Last updated:** [May 13, 2026, 9:32pm UTC](https://ask.igwn.org/t/astrophysical-calibration-of-gw-detectors/1504 "2026-05-13T21:32:10Z")
Data from two loud events have been used for the first time, as an “astrophysical calibration” of the gravitational-wave detectors. In a typical gravitational-wave data analysis, signal waveforms together with measured …
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## [Open Data Workshop 2026](https://ask.igwn.org/t/open-data-workshop-2026/1429)
**Author:** [@mdubois](https://ask.igwn.org/u/mdubois)\
**Replies:** 2\
**Last updated:** [April 3, 2026, 3:21pm UTC](https://ask.igwn.org/t/open-data-workshop-2026/1429 "2026-04-03T15:21:22Z")
Registration is now open for the 2026 Gravitational Wave Open Data Workshop. This free workshop provides a crash-course in GW data analysis. It will be held April, 20-23rd, 2026. You can participate in-person in Toulou…
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## [Webinar: GWTC-4.0 Introduction and Data Release](https://ask.igwn.org/t/webinar-gwtc-4-0-introduction-and-data-release/1396)
**Author:** [@jonah](https://ask.igwn.org/u/jonah)\
**Replies:** 0\
**Last updated:** [November 10, 2025, 8:24pm UTC](https://ask.igwn.org/t/webinar-gwtc-4-0-introduction-and-data-release/1396 "2025-11-10T20:24:24Z")
On Thursday, 13 November 2025, at 10:00 AM Eastern US (other time zones below), the LVK will host an online webinar entitled “Introduction and Data Release: GWTC-4.0.” This webinar will present an introduction to the GWT…
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## [GWOSC website outage](https://ask.igwn.org/t/gwosc-website-outage/1083)
**Author:** [@jonah](https://ask.igwn.org/u/jonah)\
**Replies:** 0\
**Last updated:** [August 6, 2024, 3:56pm UTC](https://ask.igwn.org/t/gwosc-website-outage/1083 "2024-08-06T15:56:57Z")
Today, August 6, 2024, the GWOSC website is unavailable due to a construction project. We are aware of the issue, and hope to restore service within the next few days.
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## [About the Announcements category](https://ask.igwn.org/t/about-the-announcements-category/1082)
**Author:** [@jonah](https://ask.igwn.org/u/jonah)\
**Replies:** 0\
**Last updated:** [August 6, 2024, 3:54pm UTC](https://ask.igwn.org/t/about-the-announcements-category/1082 "2024-08-06T15:54:37Z")
The GWOSC team will use this category to post announcements, such as new data sets or Open Data Workshops. Watch the Announcements Topic to get notifications and stay current.